American Water Works Company, Inc.
MX ˙ BMV ˙ US0304201033
SecurityMX:AWK / American Water Works Company, Inc.
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership23,985 shares
Latest Disclosed Value $ 3,264,119
Robeco Institutional Asset Management B.V. reports 9.38% decrease in ownership of AWK / American Water Works Company, Inc.

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 23,985 shares of American Water Works Company, Inc. (MX:AWK) valued at $3,264,119 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 26,467 shares of American Water Works Company, Inc.. This represents a change in shares of -9.38% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-21 2026-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 23,985 -2,482 -9.38 3,264 -5.47 0.0047
2026-01-23 2025-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 26,467 -486,198 -94.84 3,454 -95.16 0.0049
2025-10-22 2025-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 512,665 -18,595 -3.50 71,358 -3.45 0.1034
2025-07-18 2025-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 531,260 479,586 928.10 73,904 869.60 0.1195
2025-04-23 2025-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 51,674 -4,669 -8.29 7,623 8.67 0.0148
2025-01-23 2024-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 56,343 15,668 38.52 7,014 17.92 0.0133
2024-10-29 2024-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 40,675 -11,897 -22.63 5,948 -12.40 0.0118
2024-07-23 2024-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 52,572 -314,270 -85.67 6,790 -84.85 0.0146
2024-04-24 2024-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 366,842 315,887 619.93 44,832 566.63 0.0974
2024-02-14 2023-12-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 50,955 7,173 16.38 6,726 24.05 0.0163
2024-02-08 2023-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 33,604 -10,178 51 0.0095
2023-10-24 2023-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 43,782 12,433 39.66 5,422 21.14 0.0145
2023-07-24 2023-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 31,349 -7,863 -20.05 4,475 -22.09 0.0117
2023-05-04 2023-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 39,212 7,453 23.47 5,744 18.68 0.0157
2023-02-07 2022-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 31,759 -9,704 -23.40 4,841 -10.34 0.0139
2022-12-01 2022-09-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 41,463 -3,823 -8.44 5,398 -19.88 0.0174
2022-10-27 2022-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 44,167 -4,794 5,750 0.0183
2022-12-01 2022-06-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 45,286 -260,824 -85.21 6,737 -86.70 0.0209
2022-07-27 2022-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 48,961 -257,149 7,284 0.0223
2022-12-01 2022-03-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 306,110 -18,401 -5.67 50,670 -17.32 0.1194
2022-04-26 2022-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 306,110 -18,401 50,670 0.1179
2022-12-01 2021-12-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 324,511 29,994 10.18 61,287 23.11 0.1304
2022-01-31 2021-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 324,511 29,994 61,287 0.1288
2022-12-01 2021-09-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 294,517 33,730 12.93 49,784 23.86 0.1104
2021-10-20 2021-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 294,517 33,730 49,784 0.1090
2022-12-01 2021-06-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 260,787 -10,488 -3.87 40,194 -1.17 0.0891
2021-07-28 2021-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 260,787 -10,488 40,194 0.0879
2022-12-01 2021-03-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 271,275 -297,100 -52.27 40,670 -53.38 0.1002
2021-04-23 2021-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 271,275 -297,100 40,670 0.0988
2022-12-01 2020-12-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 568,375 203,117 55.61 87,228 64.84 0.2292
2021-01-28 2020-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 568,375 203,117 87,228 0.2264
2021-01-19 2020-09-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 365,258 -39,950 -9.86 52,918 1.50 0.1636
2020-10-29 2020-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 365,258 -39,950 52,918 163,428.0067
2021-01-19 2020-06-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 405,208 -70,602 -14.84 52,134 -8.36 0.1770
2020-07-20 2020-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 405,208 -70,602 52,134 176,899.9610
2021-01-19 2020-03-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 475,810 -135,270 -22.14 56,889 -24.22 0.2282
2020-04-30 2020-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 475,810 -135,270 56,889 228,023.9416
2021-01-19 2019-12-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 611,080 90,246 17.33 75,070 16.02 0.2403
2020-02-06 2019-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 611,080 90,246 75,070 240,105.6222
2021-01-19 2019-09-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 520,834 9,879 1.93 64,705 9.17 0.2284
2019-10-17 2019-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 520,834 9,879 64,705 228,111.7351
2021-01-19 2019-06-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 510,955 -4,914 -0.95 59,272 10.20 0.2093
2019-07-19 2019-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 510,955 -4,914 59,272 209,008.5757
2021-01-19 2019-03-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 515,869 -15,257 -2.87 53,787 11.69 0.1978
2019-05-02 2019-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 515,869 -15,257 53,787 197,486.7301
2021-01-19 2018-12-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 531,126 8,088 1.55 48,158 4.67 0.2162
2019-02-08 2018-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 531,126 8,088 48,158 215,865.8485
2021-01-19 2018-09-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 523,038 -13,458 -2.51 46,011 0.45 0.1822
2018-10-25 2018-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 523,038 -13,458 46,011
2021-01-19 2018-06-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 536,496 -39,314 -6.83 45,804 -3.14 0.2086
2018-08-03 2018-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 536,496 -39,314 45,804
2021-01-19 2018-03-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 575,810 -12,955 -2.20 47,289 -12.21 0.2219
2018-05-07 2018-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 575,810 -12,955 47,289 221,148.5320
2021-01-19 2017-12-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 588,765 6,668 1.15 53,865 14.37 0.2791
2018-01-25 2017-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 588,765 6,668 53,865
2021-01-19 2017-09-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 582,097 -68,262 -10.50 47,096 -7.10 0.2924
2017-10-17 2017-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 582,097 -68,262 47,096 291,776.2418
2021-01-19 2017-06-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 650,359 -67,978 -9.46 50,697 -9.25 0.3266
2017-08-07 2017-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 650,359 -67,978 50,697 330,078.2996
2021-01-19 2017-03-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 718,337 -373,826 -34.23 55,864 -29.31 0.3720
2017-05-15 2017-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 718,337 -373,826 55,864 371,045.3144
2017-02-09 2016-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 1,092,163 -201,576 -15.58 79,030 -18.38 0.6183
2016-11-07 2016-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 1,293,739 -85,132 -6.17 96,822 -16.91 0.7157
2016-07-22 2016-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 1,378,871 115,659 9.16 116,530 33.83 0.8836
2016-05-16 2016-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 1,263,212 841,813 199.77 87,074 245.81 0.6985
2016-02-08 2015-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 421,399 41,937 11.05 25,180 20.47 0.2153
2015-11-12 2015-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 379,462 0 0.00 20,902 13.27 0.1592
2015-08-17 2015-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 379,462 -14,190 -3.60 18,453 -13.52 0.1401
2015-04-24 2015-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 393,652 -16,427 -4.01 21,339 -2.37 0.1604
2015-02-12 2014-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 410,079 -13,295 -3.14 21,857 7.04 0.1567
2014-11-10 2014-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 423,374 128,853 43.75 20,419 40.20 0.1459
2014-08-13 2014-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 294,521 2,613 0.90 14,564 9.89 0.1042
2014-05-07 2014-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 291,908 -12,900 -4.23 13,253 2.89 0.1017
2014-02-04 2013-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 304,808 3,616 1.20 12,881 3.60 0.1070
2013-11-12 2013-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 301,192 -6,863 -2.23 12,433 -2.11 0.1208
2013-08-27 2013-06-30 13F American Water Works COM 030420103 308,055 308,055 12,701 0.1285
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.